27429 Patek Philippe 2508 Calatrava TIFFANY & CO, 18k yellow gold case is in outstanding original condition and appears to be unpolished, the four o clock hallmark is clear and defined, manual wind Patek Philippe 27 sc movement, the bracelet is CB signed in 14K and will fit up to a 8in wrist, the original radium dial is in excellent condition with no major flaws or defects, the dial is signed TIFFANY & CO on top of the Patek Philippe signature, the radium on the hands is consistent and also appears original, blue steel constant seconds hand, original unsigned crown, nice domed crystal, caseback 18K stamp is clear and bold, original dust cover, size 35mm, thickness 10.7mm, Amazing collector condition watch of an important Patek Philippe reference accompanied by original Patek Philippe + Tiffany & Co box and archive certificate confirming the date of sale in October 1954.

This is a vintage c. 1954 18k yellow Patek Philippe Calatrava TIFFANY & CO 2508. It's in outstanding original, unpolished condition, with a case back hallmark at 4 o'clock clear and defined, exhibiting very light wear. It has a 14k yellow gold mesh bracelet with a double folding deployment clasp, and a domed acrylic crystal. It has a screw down winding crown, and a solid screw down case back with the original anti-magnetic dust cover inside. The inside of the engine turned case back is stamped "PATENT – PATEK PHILIPPE – GENEVE – SWISS – REF 2508," several hallmarks, and a serial number. The 35mm diameter solid three-body case, straight scalloped lugs, and angled flat stepped bezel, have the original polish. The original silver radium dial is signed "TIFFANY & CO," with applied boat-shaped yellow gold hour indices with radium inserts, around a black perimeter minute/second chapter ring. It has the original gold sword hands with evenly aged radium inserts, and a blued steel center sweep second hand. It's water resistant, and the 10.7mm thick case, dial, and movement are all signed.
This Patek Philippe Calatrava TIFFANY & CO 2508 has a mechanical manual winding Patek Philippe caliber 27 SC movement (produced between 1946 and 1970). It's rhodium-plated with fausses côtes and cotes de Geneve embellishment, and it's stamped twice with the Seal of Geneva quality mark. It's constructed with 18 jewels, a straight-line lever escapement, and a cut bimetallic compensation balance adjusted to heat, cold, isochronism, and 5 positions. It has a shock absorber device, a blued steel Breguet balance spring, and a swan neck micrometer regulator. The mechanism oscillates at a frequency of 21,600 vph (3 Hz).

The Patek Philippe Calatrava 2508 was introduced in 1951 and this Tiffany signed edition was made c. 1954.